Loading... Please wait...Plug into any 110 volt electrical outlet. When there is a power failure, electronic pulsating alarm will go off and red LED light will start flashing. If you have chicks or birds that need looking after when electricity goes off on a cold windy night, plug in this unit in your bedroom to wake you when the electricity goes off. Has a built-in 10 to 15 second delay so that short time power outage will not set the alarm off. Tone is 95 decibels at 30 cm.